The Samsung Galaxy S4 now has more power and cutting edge features like face/eye tracking and gesture-based controls are features iPhone 5 users can only dream of. The resolution of the 7.9mm Galaxy S4 is higher than the iPhone 5, and there’s more screen real-estate on the 5-inch Galaxy 4 than the 4-inch iPhone 5. You can download the user manual for the Galaxy S4 here.